Hi Tsuchiya/Verdre,

>- "cmd_timeout"
>     This issue will occur after a second suspend like the dmesg log on
>     >Comment#91 regardless of 2.4GHz/5GHz AP or power_save on/off


1. Command timeout after second suspend could be recreated in my Surface 4;

2. Logs were similar to the one in #91 & #92 by Verdre;

3. It is found that the command, which timed out did not reach the
firmware at all and am trying to understand more;

4. Once a command times out, driver dumps few scratch registers and also
it triggers the firmware dump; But I fail to get these in my device(I
don't know why, it is a different problem); So, I still fail to confirm
we are hitting same issue;

Note that, when the dump is uploaded to user-space, dmesg will say:
"== mwifiex dump information to /sys/class/devcoredump end"

Could you please share the dump(along with dmesg), which is saved in below 
file(it is automatically deleted after 5 minutes):
********************************************
/sys/devices/virtual/devcoredump/devcd1/data
********************************************

>- "Firmware wakeup failed"
This could also be recreated for the first time now; I kept Surface 4 connected 
to AP and PING overnight; But I have no much detail yet;

I will comeback soon on remaining two concerns you raised in comment#95;


Regards,
Ganapathi

Regards,
Ganapathi

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1730924

Title:
  Wifi does down "crash" in Surface Pro 4

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I have a Surface Pro 4. The wifi works well in principle, but unfortunately 
it drops every x minutes. The only way to fix it I've found is to reboot the 
computer.
  lsb_release -rd
  Description:    Ubuntu 17.10
  Release:        17.10

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: linux-image-4.13.0-16-generic 4.13.0-16.19
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  predatux   1537 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Wed Nov  8 10:41:26 2017
  HibernationDevice: RESUME=UUID=147af4ba-a4ce-41fe-a176-b36a1f6a590b
  Lsusb:
   Bus 002 Device 002: ID 045e:090c Microsoft Corp. 
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 002: ID 045e:07e8 Microsoft Corp. 
   Bus 001 Device 003: ID 1286:204c Marvell Semiconductor, Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Microsoft Corporation Surface Pro 4
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic 
root=UUID=125200b0-7377-4985-a217-15503781a525 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.13.0-16-generic N/A
   linux-backports-modules-4.13.0-16-generic  N/A
   linux-firmware                             1.169
  SourcePackage: linux
  UpgradeStatus: Upgraded to artful on 2017-10-22 (16 days ago)
  dmi.bios.date: 02/24/2017
  dmi.bios.vendor: Microsoft Corporation
  dmi.bios.version: 106.1624.768
  dmi.board.name: Surface Pro 4
  dmi.board.vendor: Microsoft Corporation
  dmi.chassis.type: 9
  dmi.chassis.vendor: Microsoft Corporation
  dmi.modalias: 
dmi:bvnMicrosoftCorporation:bvr106.1624.768:bd02/24/2017:svnMicrosoftCorporation:pnSurfacePro4:pvrD0B08F1C03P38:rvnMicrosoftCorporation:rnSurfacePro4:rvr:cvnMicrosoftCorporation:ct9:cvr:
  dmi.product.family: Surface
  dmi.product.name: Surface Pro 4
  dmi.product.version: D:0B:08F:1C:03P:38
  dmi.sys.vendor: Microsoft Corporation

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